If @orientation is horizontal, the colors are grouped in rows,
with @colors_per_line colors in each row. If @horizontal is %FALSE,
the colors are grouped in columns instead.
The default color palette of [class@Gtk.ColorChooserWidget] has
45 colors, organized in columns of 5 colors (this includes some
grays).
The layout of the color chooser widget works best when the
palettes have 9-10 columns.
Calling this function for the first time has the side effect
of removing the default color palette from the color chooser.
If @colors is %NULL, removes all previously added palettes.
Adds a palette to the color chooser.
If @orientation is horizontal, the colors are grouped in rows, with @colors_per_line colors in each row. If @horizontal is %FALSE, the colors are grouped in columns instead.
The default color palette of [class@Gtk.ColorChooserWidget] has 45 colors, organized in columns of 5 colors (this includes some grays).
The layout of the color chooser widget works best when the palettes have 9-10 columns.
Calling this function for the first time has the side effect of removing the default color palette from the color chooser.
If @colors is %NULL, removes all previously added palettes.